Question

balancing chemical equations
balance the equations below:

1. __ $\text{n}_2$ + __ $\text{h}_2$ $

ightarrow$ ____ $\text{nh}_3$

1. ____ $\text{kclo}_3$ $

ightarrow$ ____ $\text{kcl}$ + ____ $\text{o}_2$

1. __ $\text{nacl}$ + __ $\text{f}_2$ $

ightarrow$ ____ $\text{naf}$ + ____ $\text{cl}_2$

1. __ $\text{h}_2$ + __ $\text{o}_2$ $

ightarrow$ ____ $\text{h}_2\text{o}$

1. __ $\text{pb(oh)}_2$ + __ $\text{hcl}$ $

ightarrow$ ____ $\text{h}_2\text{o}$ + ____ $\text{pbcl}_2$

1. __ $\text{albr}_3$ + __ $\text{k}_2\text{so}_4$ $

ightarrow$ ____ $\text{kbr}$ + ____ $\text{al}_2(\text{so}_4)_3$

1. __ $\text{ch}_4$ + __ $\text{o}_2$ $

ightarrow$ ____ $\text{co}_2$ + ____ $\text{h}_2\text{o}$

1. __ $\text{c}_3\text{h}_8$ + __ $\text{o}_2$ $

ightarrow$ ____ $\text{co}_2$ + ____ $\text{h}_2\text{o}$

1. __ $\text{c}_8\text{h}_{18}$ + __ $\text{o}_2$ $

ightarrow$ ____ $\text{co}_2$ + ____ $\text{h}_2\text{o}$

1. __ $\text{fecl}_3$ + __ $\text{naoh}$ $

ightarrow$ ____ $\text{fe(oh)}_3$ + ____$\text{nacl}$

1. __ $\text{p}$ + __$\text{o}_2$ $

ightarrow$ ____$\text{p}_2\text{o}_5$

1. __ $\text{na}$ + __ $\text{h}_2\text{o}$ $

ightarrow$ ____ $\text{naoh}$ + ____$\text{h}_2$

1. ____ $\text{ag}_2\text{o}$ $

ightarrow$ ____ $\text{ag}$ + ____$\text{o}_2$

1. __ $\text{s}_8$ + __$\text{o}_2$ $

ightarrow$ ____ $\text{so}_3$

1. __ $\text{co}_2$ + __ $\text{h}_2\text{o}$ $

ightarrow$ ____ $\text{c}_6\text{h}_{12}\text{o}_6$ + ____$\text{o}_2$

1. __ $\text{k}$ + __ $\text{mgbr}$ $

ightarrow$ ____ $\text{kbr}$ + ____ $\text{mg}$

1. __ $\text{hcl}$ + __ $\text{caco}_3$ $

ightarrow$ ____ $\text{cacl}_2$ + ____$\text{h}_2\text{o}$ + ____ $\text{co}_2$

1. __ $\text{hno}_3$ + __ $\text{nahco}_3$ $

ightarrow$ ____ $\text{nano}_3$ + ____ $\text{h}_2\text{o}$ + ____ $\text{co}_2$

1. __ $\text{h}_2\text{o}$ + __ $\text{o}_2$ $

ightarrow$ ____ $\text{h}_2\text{o}_2$

1. __ $\text{nabr}$ + __ $\text{caf}_2$ $

ightarrow$ ____ $\text{naf}$ + ____ $\text{cabr}_2$

1. __ $\text{h}_2\text{so}_4$ + __ $\text{nano}_2$ $

ightarrow$ ____ $\text{hno}_2$ + ____ $\text{na}_2\text{so}_4$

Explanation:

Step1: Balance N, then H

$1\text{N}_2 + 3\text{H}_2
ightarrow 2\text{NH}_3$

Step2: Balance O, then K/Cl

$2\text{KClO}_3
ightarrow 2\text{KCl} + 3\text{O}_2$

Step3: Balance Cl, then F/Na

$2\text{NaCl} + 1\text{F}_2
ightarrow 2\text{NaF} + 1\text{Cl}_2$

Step4: Balance O, then H

$2\text{H}_2 + 1\text{O}_2
ightarrow 2\text{H}_2\text{O}$

Step5: Balance Cl, then O/H

$1\text{Pb(OH)}_2 + 2\text{HCl}
ightarrow 2\text{H}_2\text{O} + 1\text{PbCl}_2$

Step6: Balance Al, then Br/SO₄

$2\text{AlBr}_3 + 3\text{K}_2\text{SO}_4
ightarrow 6\text{KBr} + 1\text{Al}_2(\text{SO}_4)_3$

Step7: Balance C, then H, then O

$1\text{CH}_4 + 2\text{O}_2
ightarrow 1\text{CO}_2 + 2\text{H}_2\text{O}$

Step8: Balance C, then H, then O

$1\text{C}_3\text{H}_8 + 5\text{O}_2
ightarrow 3\text{CO}_2 + 4\text{H}_2\text{O}$

Step9: Balance C, then H, then O

$2\text{C}_8\text{H}_{18} + 25\text{O}_2
ightarrow 16\text{CO}_2 + 18\text{H}_2\text{O}$

Step10: Balance Fe, then Cl/OH/Na

$1\text{FeCl}_3 + 3\text{NaOH}
ightarrow 1\text{Fe(OH)}_3 + 3\text{NaCl}$

Step11: Balance P, then O

$4\text{P} + 5\text{O}_2
ightarrow 2\text{P}_2\text{O}_5$

Step12: Balance Na, then O/H

$2\text{Na} + 2\text{H}_2\text{O}
ightarrow 2\text{NaOH} + 1\text{H}_2$

Step13: Balance O, then Ag

$2\text{Ag}_2\text{O}
ightarrow 4\text{Ag} + 1\text{O}_2$

Step14: Balance S, then O

$1\text{S}_8 + 12\text{O}_2
ightarrow 8\text{SO}_3$

Step15: Balance C, then H, then O

$6\text{CO}_2 + 6\text{H}_2\text{O}
ightarrow 1\text{C}_6\text{H}_{12}\text{O}_6 + 6\text{O}_2$

Step16: Balance Br, then K/Mg

$2\text{K} + 1\text{MgBr}_2
ightarrow 2\text{KBr} + 1\text{Mg}$

Step17: Balance Cl, then CO₃/O/H

$2\text{HCl} + 1\text{CaCO}_3
ightarrow 1\text{CaCl}_2 + 1\text{H}_2\text{O} + 1\text{CO}_2$

Step18: Balance all atoms

$1\text{HNO}_3 + 1\text{NaHCO}_3
ightarrow 1\text{NaNO}_3 + 1\text{H}_2\text{O} + 1\text{CO}_2$

Step19: Balance O, then H

$2\text{H}_2\text{O} + 1\text{O}_2
ightarrow 2\text{H}_2\text{O}_2$

Step20: Balance Br, then F/Na

$2\text{NaBr} + 1\text{CaF}_2
ightarrow 2\text{NaF} + 1\text{CaBr}_2$

Step21: Balance SO₄, then NO₂/Na/H

$1\text{H}_2\text{SO}_4 + 2\text{NaNO}_2
ightarrow 2\text{HNO}_2 + 1\text{Na}_2\text{SO}_4$

Answer:

1. $1\text{N}_2 + 3\text{H}_2

ightarrow 2\text{NH}_3$

1. $2\text{KClO}_3

ightarrow 2\text{KCl} + 3\text{O}_2$

1. $2\text{NaCl} + 1\text{F}_2

ightarrow 2\text{NaF} + 1\text{Cl}_2$

1. $2\text{H}_2 + 1\text{O}_2

ightarrow 2\text{H}_2\text{O}$

1. $1\text{Pb(OH)}_2 + 2\text{HCl}

ightarrow 2\text{H}_2\text{O} + 1\text{PbCl}_2$

1. $2\text{AlBr}_3 + 3\text{K}_2\text{SO}_4

ightarrow 6\text{KBr} + 1\text{Al}_2(\text{SO}_4)_3$

1. $1\text{CH}_4 + 2\text{O}_2

ightarrow 1\text{CO}_2 + 2\text{H}_2\text{O}$

1. $1\text{C}_3\text{H}_8 + 5\text{O}_2

ightarrow 3\text{CO}_2 + 4\text{H}_2\text{O}$

1. $2\text{C}_8\text{H}_{18} + 25\text{O}_2

ightarrow 16\text{CO}_2 + 18\text{H}_2\text{O}$

1. $1\text{FeCl}_3 + 3\text{NaOH}

ightarrow 1\text{Fe(OH)}_3 + 3\text{NaCl}$

1. $4\text{P} + 5\text{O}_2

ightarrow 2\text{P}_2\text{O}_5$

1. $2\text{Na} + 2\text{H}_2\text{O}

ightarrow 2\text{NaOH} + 1\text{H}_2$

1. $2\text{Ag}_2\text{O}

ightarrow 4\text{Ag} + 1\text{O}_2$

1. $1\text{S}_8 + 12\text{O}_2

ightarrow 8\text{SO}_3$

1. $6\text{CO}_2 + 6\text{H}_2\text{O}

ightarrow 1\text{C}_6\text{H}_{12}\text{O}_6 + 6\text{O}_2$

1. $2\text{K} + 1\text{MgBr}_2

ightarrow 2\text{KBr} + 1\text{Mg}$

1. $2\text{HCl} + 1\text{CaCO}_3

ightarrow 1\text{CaCl}_2 + 1\text{H}_2\text{O} + 1\text{CO}_2$

1. $1\text{HNO}_3 + 1\text{NaHCO}_3

ightarrow 1\text{NaNO}_3 + 1\text{H}_2\text{O} + 1\text{CO}_2$

1. $2\text{H}_2\text{O} + 1\text{O}_2

ightarrow 2\text{H}_2\text{O}_2$

1. $2\text{NaBr} + 1\text{CaF}_2

ightarrow 2\text{NaF} + 1\text{CaBr}_2$

1. $1\text{H}_2\text{SO}_4 + 2\text{NaNO}_2

ightarrow 2\text{HNO}_2 + 1\text{Na}_2\text{SO}_4$